Reinforcements are soldiers or policemen who are sent to join an army or group of police in order to make it stronger.
例句
...the despatch of police and troop reinforcements.派遣警察和军队支援
N-VAR
增强;加强;加固
The reinforcement of something is the process of making it stronger.
例句
I am sure that this meeting will contribute to the reinforcement of peace and security all over the world...我相信这次会议将会促进世界范围内的和平与安全。What the teacher now has to do is remove the reinforcement for this bad behaviour...现在老师要做的是避免这种不良行为更加严重。